TM 1-1670-260-12&P 0003 00 __________________________________________________________________________________________ i. Drogue Chute Installation NOTE As determined by ground crew, a drogue chute may be attached to the disabled helicopter to facilitate stable flight. (1) Secure drogue chute to the tail end of tail-boom. Do not deploy drogue chute until recovery helicopter has hovered over disabled or damaged helicopter. j. Install the AH-1 mast wedge assembly (15) in accordance with Figure 1, View A location, and Figure 4, as follows: NOTE UMARK contains two similar mast wedge assemblies for different helicopters. Refer to WP 0001 00 of this manual and verify that correct mast wedge assembly is in use. (1) Open the mast wedge (Figure 4) rubber tube section along the centerline seam and install the rubber tube section around the main rotor mast near the bottom of the main rotor hub assembly. Figure 4. AH-1 Mast Wedge Assembly NOTE When installing wedge assembly it may be necessary to slightly rock blades using fixed length tie-downs attached to blade sleeve assemblies to place wedge assembly in correct location. (2) Carefully slide the tube up into the gap between the main rotor hub and the main rotor mast. (3) Verify that stops on the main rotor hub fully contact mast wedge assembly and not main rotor mast. (4) Loop lanyard attached to mast wedge assembly around main rotor hub and secure snap back onto lanyard. Lanyard is designed to prevent mast wedge assembly from sliding down and exposing main rotor assembly. k. The disabled helicopter is now ready for hookup to the recovery helicopter. 0003 00-11